Mask Prompter 3.4.64 for Mac

Mac Utilities

Updated Aug 14, 2026

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Mask Prompter is a plugin for Adobe After Effects, sold through aescripts, that takes over one of the slowest jobs in motion design. Rotoscoping means drawing masks around an object frame after frame. With this plugin you type a short text prompt naming what you want to isolate, and the AI models find it and build the mask for you. The models run locally on your Mac.

Key Features

• Creates masks from plain text prompts inside After Effects
• Tracks the selected object and keeps the mask following it over time
• Segment Anything models run fully locally on your own machine
• Handles more than one object so complex scenes stay manageable
• Edge controls help refine the matte before you export or composite

How to Download

1. Download from the official site and complete your purchase there.
2. Install the plugin using the aescripts manager app or the supplied installer.
3. Open After Effects, load a clip and find Mask Prompter in the effects panel.

System Requirements

You need a licensed copy of Adobe After Effects on a Mac with enough power for video work. AI processing takes time and memory, so a recent Apple Silicon machine with generous storage for models and cache files will serve you best.

FAQs

Do I still need to draw any masks by hand?

Often not for clean shots. Busy scenes, motion blur or partly hidden objects may still need manual fixes.

Does it send my footage to the cloud?

No. The vendor states that the models run fully locally, so your footage stays on your own Mac while the masks are generated.

Is Mask Prompter a stand alone app?

No. It is a plugin that works inside Adobe After Effects, so you need that host app installed and licensed before the plugin can run.